Multiple tapping machine



Aug. 14, 1923.

W. L. BRUBAKER MULTIPLE TAPPING MACHINE File May 11 1922 2 Sheets-Sheet l lhfiSJl 112 w. L. BRUBAKER MULTIPLE TAPPING MACHINE Filed y 11; 1922 2 Sheets-Sheet 2 7F 1 ii. awn/3%)? v the line 5-5 BAKER, a citizen of the Patented Aug. lid, W23.

WILLIAM L. BRT TBAKER, F EEOLA, PEI TN$YLVAN1Q.

Application filed May 11,

To all. whom it may concern:

e it known that l, l-VILLIAM L. BRU- United States, residing in Enola, Cumberland County, Pennsylvania, have invented certain Improvements in a Multiple Tapping Machine, of which the following is'a specification.

One object of my invention is'to construct amachine for simultaneously-tapping a number of. holes in pipes, or other articles.

A. further object of the invention is to make the spindle bearings adjustable. These objects I attain in the following manner, reference being had to the accompanying drawings, in which:

Fig. l isa: side view of my improved tapping machine;

F 1g. 2 is a plan v1ew of the Fig; 3. is an enlarged. in section; h

Figure 4t is a transversesectional view on the line M, Fig. 3;

Fig.5 is a transverse sectional View on Fi 1; Fig. 6 is a det ched perspective view of machine plan view, partly one of the bearings; and

Fig. 7 is asectional view of the lubricating pipe.

.1 isthe base of the machine on which is mounted a head 2 hav' mg bearings 3 for a I driven shaft l, Un this shaft is a three faced pulley 5 for the driving belt. Secured to the bed, in front of the head 2, is a transverse frame 6 having upright ends '71 7 A shaft 8 is mounted in bearings 9 formed integral with the ends 7 and an intermediate bearing 9 is preferably used, which forms an integral part of the frame. Extending from one end of the frame to the other end ch arc mounted the Each spindle bearing is made as shown in Fig.6, and husa' central opening through which the spindle i2 extends. The spindle bearings can be adjusted on the rods and held in the position in which they are adjusted by set screws 13.

)n the inner end oi the shaft t is a bevel pinion 14, which meshes with a bevel wheel secured to y the shaft '8'. Adjustably mounted on the shaft 8 are bevel gear wheels 18, which mesh with gear wheels 17 on the spindles l2. At the opposite end of each spindle bearings 11."

the support by clam rom the spindle-carryin has been drilled a 1 9 i i? l \il f)? i 17] ll (i ll ll (1, Ll ices. semi no. seams. spindle from the gear. Wheel is a chuck 18 of any of the ordinary types. Each chuck has clamping jaws fora tap 19. I

Secured to the opposite end of the base 1 from the head 2 are two plates 20. Each plate has a rib 21 extending into a groove, 22 in a slide 23. On the. inner end of the slide is an elongated support 24 for the work to be tapped. In the resent instance, the support has a longitudinal V-groovetor a pipe a to be tapped. The pipe is secured to p plates 25 and Wing nuts 28 on bolts pro ecting from the suport. The slide can be moved towards end frame by a lever ids, and extending 27, pivoted at 28 to the s through a swivel bearing 29 on one of the plates 20.

Adjustahly mounted mom of the spindlebearings lfis an arm 30 to which is attached a stop 31. The stop is slotted for the passsage of a clamp screw 32. The stop limits the movement of the slide 23 to which the work is enetrated by the tap.

In order to provide a continuous flow ct lubricating liquid over the Work and the tools, resei-yoir'33 is provided. The reservoir-is secured to the side of the base, in the present instance, and a cireulatingpu np 34' is connected to the reservoir and to an overhead pipe 35 by a flexible tube 36. The pipe 35 ispcrforated, as shown in Fig. 7, to allow the ll uid to low onto the Work; 37 is a I pan, w iich collects ihelubricating liquid and returns it to the reservoir. I

The pump shaft 38 is driven from the shatt ithrough a belt 39 and shaft 40. Other mcans of driving the pump may be used, if desired.

The vv'ork (e, in the present instance, is the manifold pipe oi a gasrange. The pipe t a the holes are'to be tapped for the 'gas cocks and branches leading to the burners of the range, adjusted on the bars andthe taps are slecured in the chucks. The pipe to be tapped is clamped to the support. The slide is then moved torwiird by the operating; handle. As the taps enter the holes in the work, they cut a screw thrwul to the proper depth, which the spindles are re ,and the extent number of points and It'fter versed by any ordanary reverse shifting mechanism, not shown. The tapped pipe is thenreinoved and another pipe issecnred in position.

While the invention is described as a tapping machine, it may be used as a drilling machine by substituting drill bits for the taps.

I claim:

1. The combination of a base; a head mounted on the base; a driven shaft on the head;"a transverse frame mounted on the on the base; a work carrier on the slide; and means for moving the work carrier towards and from the spindles. I

2. The combination of a base; a head mounted on one end of the base; a shaft in said head; a gear wheel on the shaft; a transverse frame secured to the base; a lengi tudinal, splined shaft on the frame; a gear wheel thereon meshing with the first mentioned gear wheel; rods on the mine; a series of spindle bearings adjustably mounted on the rods; a spindle in each bearing; a gear wheel on one end of each spindle and a chuck at the opposite end of each spindle; a seriesof gear wheels on the splined shaft meshing with the gear wheels on spindles; a work-carrying slide on the base; and means for moving said slide towards and from the chucks of the spindles.

WILLIAM L. BRUPMKKER.

the 

